The Drag Reduction Mechanism of Vibration Digging Shovel

Abstract

In order to investigate the drag reduction mechanisms of vibration digging shovel from the kinematics and mechanical aspects, and to estimate the magnitude of its traction resistance, we performed kinematic analysis when the velocity of the digging shovel was undergoing sinusoidal changes. Based on the analysis of the relationship between vibration direction angle, ascending direction angle and the edge motion curve, we evaluated the efficacy of different mining modes and proposed the ideal working conditions. We found that when the vibration direction angle φ <0 it could produce favorable cutting conditions. When the cutting direction angle θ was slightly less than or equal to the buried angle α and the ascending direction angle λ <π/2, the traction resistance was the least and soil-crushing effect was enhanced. The application of the moving viscous friction resistance model of mining shovel to analyze the force, including the impact of cutting speed on vibration viscous friction, could optimize the ideal working state and deduce the horizontal traction resistance formula of cutting and ascending. This model will be conducive to the structural design of vibration digging shovel and the estimation of its traction resistance.